Articles | Volume 25, issue 10
https://doi.org/10.5194/nhess-25-4153-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-25-4153-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Review article
| 
24 Oct 2025
Review article |
| 24 Oct 2025
| 24 Oct 2025
Review article: Analysis of sediment disaster risk assessment surveys in Brazil: a critical review and recommendations
Geological Survey of Brazil, Rio de Janeiro 22290-255, Brazil
Doctoral Program in Environmental Studies, Institute of Life and Earth Sciences, Graduate School of Science and Technology, University of Tsukuba, Tsukuba 305-8577, Japan
Taro Uchida
Institute of Life and Environmental Sciences, Graduate School of Science and Technology, University of Tsukuba, Tsukuba 305-8577, Japan
Related authors
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Akito Kanazawa and Taro Uchida
Hydrol. Earth Syst. Sci., 29, 3165–3202, https://doi.org/10.5194/hess-29-3165-2025, https://doi.org/10.5194/hess-29-3165-2025, 2025
Short summary
Short summary
Camera-based rainfall observation can measure rainfall with high spatiotemporal resolution and low cost. This study proposed a method for estimating rainfall intensity from images using the relationship between image information and rainfall intensity. The method was applied to outdoor cameras, and rainfall intensity could be estimated from the images. The method has the potential to facilitate the development of a camera-based rainfall observation technology that is accurate and versatile.
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Short summary
Five federal sediment-related disaster risk assessments have been conducted in Brazil, each with distinct objectives and methodologies. To evaluate their effectiveness and identify issues, we analyzed the methods and outcome data and reviewed the status of disaster prevention initiatives based on the assessment results. Our findings revealed persistent problems across all methods. Consequently, we recommend improvements to enhance the methods' efficacy and reliability.
Five federal sediment-related disaster risk assessments have been conducted in Brazil, each with...
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